Donald Trump and Katy Tur. Carlo Allegri/Getty Images In her new book about her time on the presidential campaign trail covering Donald Trump, MSNBC host Katy Tur described receiving an unwelcome greeting from the president: a kiss on the cheek.

The incident happened before one of Trump's appearances on MSNBC's "Morning Joe."

The journalist visited more than 40 states as the "Trump correspondent" for NBC News and MSNBC, beginning on June 16, 2015, when Trump descended the escalator at Trump Tower to announce his candidacy.

Trump has publicly berated Tur for her critical coverage of him — calling her out by name from the podium at two campaign rallies, in one instance describing her as "Little Katy" — and has accused her of being a "third-rate reporter" and having "no access" to him or his campaign.

On Tuesday morning, following the release of Tur's book, Trump tweeted: "Fascinating to watch people writing books and major articles about me and yet they know nothing about me & have zero access. #FAKE NEWS!"